This was at an English camp in a little northern town. This young lady's skirt is the local fabric and pattern; I saw one on campus last week so I knew just where the student came from. It's a Friday thing, on Friday all the girls wear the same skirts.
The shirt is locally produced and until the seventies was associated only with farmers. In this area of Thailand, the northern mountains, there was a communist semi-upheaval going on then and the city government decided that on Friday everybody should wear a farmers shirt, for worker solidarity. So now on Friday everyone, teachers, bank tellers, government officials at the labor office, everybody wears a farmer shirt. I own more than ten of them by now, different styles.
And dig that board work!